Sandgroper Posted April 27, 2015 Report Share Posted April 27, 2015 Just trying to improve the starting on my 1972 GT6 Mk3 Rotoflex. Had a look at the workshop manual but this doesn't show the same carb ! The brass tag on the front carb has the numbers '2245' and '3432R' impressed on it. The carbs work fine once the engine is going but starting is poor. I feel that the problem is in the choke activation area. The choke cable operates on the front carb only. This is connected to the rear carb by a fuel line - seeming to indicated that the choke supplies extra juice to the rear carb. for starting. The rear carb looks to be exactly the same type of carb, but there are no interconnecting options. My hunch is that it isn't giving a rich enough mixture. Has anyone any ideas? Is this arrangement common? How do you set it up? Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 27, 2015 Report Share Posted April 27, 2015 the tag with 3432 is correct these are CDSE150 the front one has the starting valve, this has a bridge n the valve connected to a outlet which is tubed to the rear unit its normal make sure the cable pulls the choke fully open, its also worth taking the stating valve off the carb and make sure all the metering hole in the discs inside are clear an not full of corrosion if the discs are scored you can re face them with a oiled wet and dry fine paper, on a glass or flat sheet and sand away the scoring dont drill the metering holes , use some soft wire or similar to clear the small holes. both carbs should open up some throttle when the choke is used the cam bolt is adjustable make sure no gaskets or filters are obstructing the front face ports an use engine oil in the dampers as thes are cdse they will have the temperature compensator on the side take it off there are 2 0 rings one at the outer case and one at the base of the small boss these fail and air leaks in also check the small plastic plunger is closed, this is loaded by a small bimetal strip the plunger has special settings but ignore all that and make sure the little sod is actually closed up to normal running temperature the idea is on over heating the plunger opens and allows air to bleed and bypass the throttle plates, ups the idle and weaken the idle mixture if this is open when it needs to be closed you never set the idle mixture correctly it is much more important that the plunger is closed when setting the mixture , if it never opens so what. to close it tighten the small nut inside Pete Pete Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 27, 2015 Report Share Posted April 27, 2015 I have the same carbs with the same choke arrangement. Quite easy to duff up with a refurb kit and, Pete's advice!. Surprised Pete didn't put you onto Buckeye Triumphs site but he's getting on a bit and things slip his mind! Although Strombergs for a TR6 Buckeye will tell you EVERYTHING you want to know about including the pesky temperature compensators. http://www.buckeyetriumphs.org/technical/Carbs/CarbsI/CarbsI.htm Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 28, 2015 Report Share Posted April 28, 2015 Doug just fancied typo on a tablet getting all the wrong letters in the right places who invented theseb stupid fings yes I an avid admirer of buckeye , brill tutorials , pete Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 28, 2015 Report Share Posted April 28, 2015 Yes, I like Buckeye, I recently discovered his thoughts on dot 5. There's pages of it! He did comparison tests and a lot of research. He describes the accompanying controversy as the brake fluid wars! http://www.buckeyetriumphs.org/technical/Brakes/Fluid/Fluid.htm Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 28, 2015 Report Share Posted April 28, 2015 Dough you should copy this link to the brakes section we took water content samples from trucks in storeage , this was done every 3 month, the results were pretty alarming , the amount of water that absorbed in the fluid by atmospheric changes allows the moist air to enter via the breather in the cap , the more air gap the worst volume changes due to temperature could end up with up to 50% water in the reservoir in less than a year that why its recomended to change stuff like dot4 every 2 years Pete Link to comment Share on other sites More sharing options...
dougbgt6 Posted April 28, 2015 Report Share Posted April 28, 2015 Dough?!! You've been looking at my photos again! Link to comment Share on other sites More sharing options...
Pete Lewis Posted April 28, 2015 Report Share Posted April 28, 2015 Sorry Dough , told you a tablet thingy and fat fingers typo's all sorts of expletives quite easily Ill stick to my laptop, 3000 letters a minute ,,,,,if you want it in words ................................................its a lot slower how about a section of selfies in the kack Peeet Link to comment Share on other sites More sharing options...
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